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Degradation method for halogenated disinfection by-products

A technology of disinfection by-products and dissolved oxygen concentration, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve inconvenience, high operating costs, secondary pollution, etc. problems, to achieve the effect of convenient use and management, guarantee of water quality safety, and rapid removal

Inactive Publication Date: 2011-11-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to solve the problems of high operating cost, poor removal effect, easy secondary pollution and inconvenient use in the existing method for degrading halogenated disinfection by-products in water, and provides a halogenated disinfection by-product Degradation method

Method used

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  • Degradation method for halogenated disinfection by-products

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specific Embodiment approach 1

[0028] Specific Embodiment 1: This embodiment is a method for degrading halogenated disinfection by-products, which is achieved through the following steps: adjusting the pH value of the water body to above 7, controlling the dissolved oxygen concentration in the water body to be lower than 2 mg / L, and then using The ultraviolet light with a wavelength of 150-260nm is irradiated to complete the degradation of halogenated disinfection by-products.

[0029]The degradation method of halogenated disinfection by-products in this embodiment does not require expensive oxidants and catalysts, does not produce secondary pollution, does not require follow-up treatment, and does not significantly change the taste of water quality; it can quickly remove disinfection by-products and is convenient Reactors are designed to meet the needs of various water bodies, easy to use and manage, and can ensure water quality safety. It is a safe, efficient, broad-spectrum and economical degradation met...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that the concentration of dissolved oxygen in the water body is controlled to be lower than 1 mg / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0032] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the irradiation time of ultraviolet light is controlled to be 0.1-100 minutes, and the dose of ultraviolet light is 15-90000 joules / liter. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

[0033] The specific ultraviolet light irradiation time or ultraviolet light dose of the present invention can be comprehensively determined according to actual water quality characteristics (pollutant concentration, turbidity, chromaticity) and light source characteristics (irradiation light intensity, illumination depth), etc., according to the existing The design specifications and requirements can easily determine the specific ultraviolet light irradiation time and dosage corresponding to different water qualities within the above range of ultraviolet light irradiation time and dose.

[0034] For the treatment of conventional drinking water, the UV dose can generally be...

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Abstract

The invention relates a degradation method for halogenated disinfection by-products and relates to a method for degrading halogenated disinfection by-products. The degradation method solves the problems of high operation cost, undesirable removal effect, secondary pollution and inconvenience for use of the conventional method for degrading the halogenated disinfection by-products in water. The degradation method comprises: regulating the pH value of water to over 7; controlling the dissolved oxygen concentration in water to be less than 2mg / L; and irradiating by using ultraviolet light with awavelength of 150 to 260 nanometers. In the degradation method provided by the method, expensive oxidizer and catalyst are not needed, secondary pollution is avoided, post treatment is not needed, and the mouthfeel of water is hardly changed; the halogenated disinfection by-products can be removed quickly, and the reactor can be designed conveniently; the use and management are convenient; and the method can be applied to effluent of urban water supply treatment plants and underground water and waste water treatment plants, industrial water and domestic water to remove the halogenated disinfection by-products in water effectively and ensure the safety of water.

Description

technical field [0001] The invention relates to a method for degrading halogenated disinfection by-products. Background technique [0002] Chlorination disinfection has the characteristics of high efficiency, low price, stability, and can prevent secondary pollution of the water delivery network. It is currently a widely used drinking water disinfection technology at home and abroad. Studies have shown that this disinfection measure has significantly reduced the incidence of waterborne intestinal infectious diseases such as typhoid fever in the population, and has played a huge role in maintaining human health. [0003] Due to the strong oxidizing properties of chlorine, when it is added as a disinfectant, it will oxidize and decompose the organic precursors (such as humic acid, fulvic acid and algae, etc.) in raw water into small molecular compounds, and form a series of halogenated disinfection with them by-product. Due to the different degrees of raw water pollution and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08
Inventor 马军岳思阳李旭春关英红陈丽玮刘桂芳
Owner HARBIN INST OF TECH
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